Revert "Fix various c++11 narrowing violations"

Summary:
This reverts commit 0d8e32ecc5413d5973d990d53ee2034b3743d2f7
These will be fixed the correct way per srhines@google.com's suggestion.

Test Plan: verified

Reviewers: randall.rushing, jriordan001

Reviewed By: randall.rushing

Differential Revision: http://review.codefirex.com/D309
mediaeditor: Fix c++11 narrowing

Summary: Depends on D309 D310

Test Plan: verified

Reviewers: randall.rushing, jriordan001

Reviewed By: randall.rushing

Differential Revision: http://review.codefirex.com/D312